package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPageQueryDTO;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private OrderService orderService;
    @Autowired
    private WebSocketServer webSocketServer;

    //用户下单
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种业务异常（地址簿为空，购物车数据为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询当前购物车数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if(list == null || list.size() ==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入1条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);
        //向订单明细表插入n条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : list) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */

    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
//        // 当前登录用户id
//        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }

//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));

        String number = ordersPaymentDTO.getOrderNumber();
        Long orderid = orderMapper.getIdbyNumber(number);

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        Integer OrderPaidStatus = Orders.PAID;
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;
        LocalDateTime check_out_time = LocalDateTime.now();
        orderMapper.updateStatus(OrderStatus,OrderPaidStatus,check_out_time,orderid);
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号"+outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    //订单搜索
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.conditionSearch(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        orderVOList.forEach(orderVO -> {
            orderVO.setAddress(getAddressStr(orderVO.getAddressBookId()));
        });
        return new PageResult(page.getTotal(), orderVOList);
    }

    //接单
    @Override
    public void confirm(Orders orders) {
        orderMapper.confirm(orders.getId());
    }

    //派送订单
    @Override
    public void delivery(Long id) {
        orderMapper.delivery(id);
    }

    @Override
    public void complete(Long id) {
        orderMapper.complete(id);
    }

    //查询订单详情
    @Override
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);

        List<OrderDetail> list = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(list);
        orderVO.setAddress(getAddressStr(orderVO.getAddressBookId()));
        return orderVO;
    }

    //拒单
    @Override
    public void rejection(Orders orders) {
        orderMapper.rejection(orders);
    }

    //取消订单
    @Override
    public void cancel(Orders orders) {
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.cancel(orders);
    }

    @Override
    public OrderStatisticsVO statistics() {
        Integer confirmed = orderMapper.getOrderNumber(Orders.CONFIRMED);
        Integer deliveryInProgressNumber = orderMapper.getOrderNumber(Orders.DELIVERY_IN_PROGRESS);
        Integer toBeConfirmedNumber = orderMapper.getOrderNumber(Orders.TO_BE_CONFIRMED);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgressNumber);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmedNumber);
        return orderStatisticsVO;
    }

    private String getAddressStr(Long addressId) {
        AddressBook addressBook = addressBookMapper.getById(addressId);
        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        return address;
    }
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    @Override
    public PageResult historyOrders(Integer page1, Integer pageSize, Integer status) {
        PageHelper.startPage(page1, pageSize);
        Page<Orders> page = orderMapper.historyOrders(status,BaseContext.getCurrentId());
        List<OrderVO> orderVOList = new ArrayList<>();

        if(page != null && page.getTotal() > 0){
            for (Orders orders : page) {
                Long orderId = orders.getId();
                String address = getAddressStr(orders.getAddressBookId());
                orders.setAddress(address);
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), orderVOList);
    }

    //再来一单
    @Override
    public void repetition(Long id){
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x->{
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x, shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public OrderVO orderDetail(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        String address = getAddressStr(orderVO.getAddressBookId());
        orderVO.setAddress(address);
        return orderVO;
    }

    //用户取消订单
    @Override
    public void userCancel(Long id) {
        Orders orderDB = orderMapper.getById(id);

        if(orderDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        if(orderDB.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(orderDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
//        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额
//
//            //支付状态修改为 退款
//            orders.setPayStatus(Orders.REFUND);
//        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    //用户催单
    @Override
    public void reminder(Long id){
        Orders orders = orderMapper.getById(id);
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号："+orders.getNumber());
        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }
}
